TY - GEN
T1 - Investigation of Secondary Winding Structure in Multi-Core Transformer in MHz Inverter using Frequency Multiplying
AU - Orikawa, Koji
AU - Ogasawara, Satoshi
AU - Takemoto, Masatsugu
AU - Itoh, Jun Ichi
N1 - Funding Information:
ACKNOWLEDGMENT This work was supported by JSPS Grant-in-Aid for Young Scientists (B) Grant Number JP17K14635.
Publisher Copyright:
© 2018 IEEE.
PY - 2018/12/3
Y1 - 2018/12/3
N2 - This paper investigates secondary winding structures in a multi-core transformer in a MHz inverter using a frequency multiplying method at the output frequency of 2.5 MHz which is five times of the switching frequency of 500 kHz. The proposed circuit can generate high output frequency by using a multi-phase inverter with phase shift control and the multi-core transformer while the switching frequency and an operational frequency of the multi-core transformer is lower than the output frequency. Therefore, an iron loss of the multi-core transformer is reduced, which results in high efficiency. In this paper, two prototypes of the multi-core transformers which have different secondary winding structures are made and compared from the view point of a leakage inductance and a parasitic capacitance viewed from the secondary side of the multi-core transformer. As a result, it is confirmed that the effect of the parasitic capacitance viewed from the secondary side of the multi-core transformer to a series resonant capacitor connected to the secondary side of the multi-core transformer in series is reduced to 1/4 compared with a loosely-coupled multi-core transformer by a highly-coupled multi-core transformer.
AB - This paper investigates secondary winding structures in a multi-core transformer in a MHz inverter using a frequency multiplying method at the output frequency of 2.5 MHz which is five times of the switching frequency of 500 kHz. The proposed circuit can generate high output frequency by using a multi-phase inverter with phase shift control and the multi-core transformer while the switching frequency and an operational frequency of the multi-core transformer is lower than the output frequency. Therefore, an iron loss of the multi-core transformer is reduced, which results in high efficiency. In this paper, two prototypes of the multi-core transformers which have different secondary winding structures are made and compared from the view point of a leakage inductance and a parasitic capacitance viewed from the secondary side of the multi-core transformer. As a result, it is confirmed that the effect of the parasitic capacitance viewed from the secondary side of the multi-core transformer to a series resonant capacitor connected to the secondary side of the multi-core transformer in series is reduced to 1/4 compared with a loosely-coupled multi-core transformer by a highly-coupled multi-core transformer.
KW - Complex permeability
KW - Frequency multiplying
KW - Leakage inductance
KW - Multi-core transformer
KW - Parasitic capacitance
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U2 - 10.1109/ECCE.2018.8558010
DO - 10.1109/ECCE.2018.8558010
M3 - Conference contribution
AN - SCOPUS:85060286872
T3 - 2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018
SP - 1279
EP - 1286
BT - 2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 10th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2018
Y2 - 23 September 2018 through 27 September 2018
ER -
